If a standalone Spigot/Paper backend server hosts AuthMe, it relies on the proxy to pass the player's real UUID and IP address. If the backend server's spigot.yml does not have bungeecord: true enabled, or if its firewall is open, an attacker can bypass the proxy entirely.
Use the Protection.countries or Protection.enableAntiBot features to block logins to high-privilege accounts from unexpected geographic regions or IP ranges. Bind Administrative Accounts to Official Auth
Require two admins to verify via Discord before an unregister command is executed.
Plugins like FastLogin are often used alongside AuthMe to allow premium (paid) Minecraft players to log in automatically without typing a password, while cracked players still have to authenticate. Minecraft Authme Bypass
Minecraft accounts are tied to unique identifiers called UUIDs. AuthMe tracks player data using a combination of the username, IP address, and UUID.
: A plugin named "PremiumAutoLogin" recently received severe backlash. Reviews indicate the plugin only checks if a username exists in Mojang's API (which is public information), rather than verifying the player's UUID. Consequently, any cracked client could change their name to Notch and automatically bypass AuthMe without a password.
Are you running a or a BungeeCord/Velocity network ? If a standalone Spigot/Paper backend server hosts AuthMe,
The absolute most effective method to render AuthMe bypass attempts irrelevant is to switch to online-mode=true . This forces Mojang to handle authentication. "This is the most secure and stable option as player identities are verified by Mojang".
For over a decade, offline-mode (or "cracked") Minecraft servers have relied on authentication plugins to protect player accounts. Among these, stands as the most popular solution. Because cracked servers do not validate identities through official Mojang/Microsoft API servers, AuthMe forces players to register and log in with a password via in-game chat before they can move or interact with the world.
For high-ranking staff members, AuthMe supports integration with Google Authenticator or Discord-based 2FA. Forcing admins to enter a time-sensitive code from their phones after doing /login adds an unbreakable layer of security, rendering traditional AuthMe bypasses useless. Conclusion Bind Administrative Accounts to Official Auth Require two
: In some versions, when a user logs in, the server generates a new session token but does not invalidate the pre-existing session cookie . An attacker who plants a known session token in the victim's browser can wait for the victim to authenticate and then reuse that token, effectively stealing the session.
Bypasses rarely stem from flaws in AuthMe’s core encryption. Instead, they usually exploit network architecture, auxiliary plugins, or outdated software versions. 1. The BungeeCord / Velocity Misconfiguration (IP Spoofing)
If you're aiming to develop a plugin or a feature related to AuthMe or authentication in general:
Minecraft servers running in "offline mode" (cracked servers) rely on authentication plugins to protect player accounts. The most popular plugin for this purpose is AuthMeReloaded (commonly known as AuthMe). Because offline mode disables Mojang's official authentication, AuthMe forces players to enter a password via an in-game command before they can move, chat, or interact with the world.
Older bypasses worked because the server didn't properly "clear" a player's state before they logged in. An attacker could sometimes interact with the world for a split second before the login prompt kicked in.